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DL9AS / jufo-project-radiosonde

Ultralight radiosondes for long-term measurements in the stratosphere
GNU General Public License v3.0
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ISEF / Jugend forscht: radiosonde project

The objective of this project is to develop ultralight radiosondes for long-term measurements in the stratosphere.

This project won First Award and the Craig R. Barrett Award for Innovation at ISEF, the world's largest student sience competition. In addition, the project won national first prize at Jugend forscht, Germany's largest youth science competition.

Developer contact: DL9AS@qsl.net

Flight path

radiosonde-3-lite_with_solar_array.png

On the previous stratospheric flights, the sondes were able to stay in the air for 25 days and circumnavigate the world several times.

4th radiosonde version

The 4th generation radiosonde adds support for aerial imaging.

Hardware

radiosonde-2-lite_front radiosonde-2-lite_back
radiosonde-4-lite_front_2

Aerial images

2-aerial_image_radiosonde_4Berlin, Germany 2-aerial_image_radiosonde_4.png Berlin, Germany
3-aerial_image_radiosonde_4 Lubiczyn, Poland 4-aerial_image_radiosonde_4.png Nitra, Slovakia

3rd radiosonde version:

The 3rd generation radiosonde is ultra light and weighs only 4.8g with solar cells.

Hardware

radiosonde-2-lite_front radiosonde-2-lite_back

radiosonde-2-lite_front_3

Assembled radiosonde

radiosonde-3-lite_with_solar_array.png

2nd radiosonde version with camera:

Aerial image Radiosonde
Documentation/aerial_image_radiosonde_2 Documentation/radiosonde-2-lite_with_camera

2nd radiosonde version

Assembled radiosonde

radiosonde-2-lite_without_solar_array

PCB breakout taps:

radiosonde-2-lite_breakouts

Solar cell array:

radiosonde-2-lite_solar_array

radiosonde-2-lite_with_solar_array

radiosonde-2-lite_with_solar_array_2

1st radiosonde version

Assembled radiosonde

radiosonde-1_with_solar_array

Balloon

radiosonde-1_in_the_air

APRS/AX.25 packet description

aprs paket description